Block Diagram Audio + Video - Philips LC4.5E Service Manual

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Audio + Video

A1 TUNER + VIF
A 3
+VTUN
+5VSW
1328
2321 VIF2
4327 2
1302 6,7 9 F306 7
11
TV
VIF1
4331 8
3
10
FM
F305
3311
4 5 1
SCL RF_AGC
A2
SDA
A2
2
1
6323 1330
3
4333 7 S IF2
2
1301
7316 S IF1
4334 8
3
3323
SSIF
+5VSW
A2
7320
SEL_IF
A2
A17 REAR IO SCART
A 3
10 SC1_CVBS_IN
SCART 2
21
20 Y/CVBS-In SC2_Y_IN
16 MON-Out
15 SC2_C_IN
15 C-In
7138 EF
16
SC2_CVBS_MON_OUT
P50
Status P50
L-In
STA TUS_2
12 L-Out
12 SC2_LR_MON_OUT
2 L
R-In
11 1
R-Out
11
R
SC2_LR_IN
SCART 1
21
20 CVBS-In 10 7119 EF
9 SC1 _CVBS_RF_OUT
9 TER-Out
SC1_FBL_IN
FBL-In
7
R-In
7
SC1_COMP_R_V_IN
6
6 G-In SC1_COMP_AV1_G_Y_CVBS_IN
5 SC1_COMP_B_U_IN
Status
5 B-In
STAT US_1
L-In
SC 1_COMP_AV1_LR_IN
L-Out
2
2 R-In
2
1 R-Out 1
L
SC1_LR_RF-OUT
1
R
Const_LR_OUT
L
LR
R
AUDIO-OUT
HP_DET_IN
D SIDE I/O
1304 1036
SVHS_C_IN
4 4
C
SVHS _AV2_Y_CVBS_IN
Y/CVBS 2 2
4 3
SVHS
2 1
SVHS_LR_IN
5
HP_LROUT
CVBS
L_FRONT_IN
6 6
L
R_FRONT_IN 8 8
R
HP_DET_R_DC1
11 11
10 10
HEAD_PH_L
HEAD_PH_R 12 11
TV SUPPLY
A6
+12VSW
LC4.5E AA
A2 HERCULES SYSTEM 7011
PAL-MULT I/SECAM TDA12021
A 4
NTSC TDA12001
CHINA/NTSC-AP TDA12011
7011 - IF
25
Sound CVBS1
Tr aps
24
31 AGC
Detect
CVBS/Y- X
30
QSS/FM
QSS Mixer/
AM Demod.
29
AM C-X
P50
STAT US_2
STAT US_1
A2
CONTROL
SC 1_CVBS_IN
55
SVHS_AV2_Y_CVBS_IN
58
SC2_Y_IN
51
SVHS_C_IN 59
SC2_C_IN
52
SC2_CVBS_RF_OUT
43
SC2_CVBS_MON_OUT
64
SC1_FBL_IN
SC1_COMP_R_V_IN
SC1_COMP_AV1_G_Y_CVBS_IN
SC1_COMP_B_U_IN
5010
2055
Y_NOTCH
7004
A7
SC2_LR_MON_OUT
SC2_LR_IN
SC1_COMP_AV1_LR_IN
SC1_LR_RF-OUT
Const_LR_OUT
HP_DET_IN
A5
36 SVHS_LR_IN
HP_LROUT
45
A5
7930 1
8
S Q
A1
SSIF(Tuner FM)
R 2
7 3
OSC
4 6930
REF SC1_COMP_AV1_LR_IN
VCC
F915
5 SVHS_LR_IN
+5VSW
SC2_LR_IN
5930
F912
6
3910 +VTUN
A12 AudioIN2LR
6910
7910
6911
SC2_LR_MON_OUT
7920
SC1_LR_RF_OUT
5920
1 3
+8VSW_TV
2921
F913
Const_LR_OUT
2
6. 19
Input
sw.
RGB Matrix
Blue & Black
cvbs/y
Gamma Corr.
Y
int
Dig. 2H/4H
INA..D
Combfilter
Skin Tone
Y Delay Adj.
Chroma
Saturation
c
PA L/NTSC/ U
int
SECAM
CS1A..D
Decoder &
H/V
V
Baseband int
Delay
U/V Delay
Output
sw.
RGB/YP P Insert
+
R B
YUV Interface
cvbs
77 78 79 80 74 75 76 70
7562 6 8 9
Pix Improvement
5560
1 3 +8VSW_2
20
(Histogram)
+12VSW
7560
2561 TDA9178T
2
A4 AUDIO DELAY LINE (LIPSYNC)
7585
7580 7581 7582 7583
2
8x
8x 7x 8x
7x
COUNTER COUNTER RAM "D" F.F.
7x 8x
A2 HERCULES
7011 - SOUND
QSS/FM
I2S Proc
AD Conv
Std Stereo
33
Decoder
Audio
Control
Vol/Treb/
Bass
34,35
Features
DACs
49,50
Audio Select
ADC/DAC
56,57
53,54
36,37
7370
CON BRI
85
RO 7013
RGB Matrix
EF
GO 86
Blue & Black
Stretch Stretch
BO 87
Gamma Corr.
A3 HISTOGRAM
U/V Tint
2020
SAT
7018
YUV
7016#
8
Peaking
SCAVEM
SCAVEM VCC
6 2
on Text
THR TR
cvbs/y 4
RES
7
DISC
3
OUT
YUV IN/OUT
CTRL
HOUT 67
Sync Sep
5
H-OSC 2051 2028
H-Shift
H/V FB/SC 66
H-Drive
2022
7019
3058
VDRA 23
7017#
Vertical & East-
3346
West Geometry
6
VDRB 22
THR
7
DISC
71 72
2034
7561
7563
SC
SANDCASTLE
PROC.
SAND
16 17 19
CASTLE
1 AUDIO AMPLIFIER
A5 AUDIO C
SDA
14
AMPLIFIER
A2
SCL
11
1752 1739
AUDIO_R
3 3 AUDIO_R
2 2
4 4
5 5
N.C.
7584
AUDIO_L
AUDIO_L
1 1
6 6
N.C. NC
PROTECT_AUDIO
7 7
NC
8x
A9
SOUND_ENABLE
"D" F.F. SOUND_ENABLE
4590 8 8
15
POR-AUDIO
9 9
NC
3753
AUDIO_R
+3V3STBY
3752
7377-A AUDIO_L 77 40
1:1
A UDOUTLSL
6
AUDOUTLSR 2
61
7376-A
1:1
60
7713
SOUND_ENABLE
A2 SOUND_ENABLE
7714
62,63
POR_AUDIO
+3V3STBY
A6 POWER_DOWN
7706 14
7376-B
7377-B
12
11
A2 EXT_MUTE 13
7371 7372
OUT_MUTE
7014
EF
R_SDTV A13
G_SDTV A13
7012
EF
B_SDTV A13
+5VSW
I354
7015#
8
VCC
6 2
THR TR 1V / div DC
4 20us / div
RES
7
DISC H_CS_SDTV
A13
OUT
CTRL 3
I354
5
2042 2021
SANDCASTLE
# = NE555 TIMER
+5VSW
8
VCC
2
TR
4
RES
V_SDTV
A13
3
OUT
CTRL
I357
5
2047
I357
1V / div DC
5ms / div
VP
7000
19
18
4
1001
+
2 L
16 L+
15W/
3 - 1
L- 8R
15
R-
7 13 3 R
15W/
VP 4
8R
7001 19
18
4
+
16
3 -
15
7 13
A2
HP_LOUT
7
HP_ROUT
1
7708
3707
7710
AUD_SUP
F_15390_061.eps
080305